Which is the best definition of a solution? a. a solution is any two liquids mixed. b. a solution is two gases mixed together. c. a solution is the same as a mixture. d. a solution is a mixture that has the same composition throughout.

If you visited mount shasta city (elevation 900 m [3000 ft.]) and found the outside air temperature to be 27°c (81°f), what would be the air temperature at the summit of mount shasta (elevation 4200 m [14,000 ft.]) at that moment-assuming that the temperature conditions with altitude change at an average, or normal, lapse rate?